Dressing and thread-cutting tool



(No Model.) 4 S. T. HARRISON.

DRESSING AND THREAD CUTTING TOOL.

No. 442,480. Patented Dec. 9, 1890.

IN VEN TOP @Z JsWM MAW W/TNESSES A 770HNE Y8 UNITED STATES PATENT OFFICE.

SAMUEL T. HARRISON, OF SKIPANON, OREGON.

DRESSHNG AND THREAD-CUTTING TOOL.

SPECIFICATION forming part of Letters Patent No. 442,480, dated December 9, 1890.

Application filed March 29, 1890- Serial No. 345,918. (No model.)

To (all whom it may concern:

Be it known that I, SAMUEL T. HARRISON, of Skipanon, in the county of Clatsop and State of Oregon, have invented a new and Improved Dressing and Thread-Cutting Tool, of which the following is a full, clear, and exact description.

The object of the invention. is to providea new and improved tool specially designed to thoroughly and rapidlydress axles of wagons and for cutting threads on the same or on bolts and pipes.

The invention consists of certain parts and details and combinations of the same, as will be hereinafter fully described, and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this spccifioation, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a front view of the improvement. Fig. 2 is a transverse section of the same on the line a: a: of Fig. 1. Fig. 3 is a sectional plan view of the same on the line 9 1/ of Fig. 2, and Fig. 4 is an enlarged side elevation of the auxiliary device for cutting threads on bolts and pipes.

The improved tool A is provided with a frame 13, having an apertured base B, three side arms B ext-ending from the base to connect with the bearing B in which is mounted to turn a shaft 0, carrying atits lower end the tool-holder D, adapted to move within the space formed by the three arms 13* of the frame. The shaft C is provided with an upper reduced end C, extending to the outside and carrying atits outer end a crank-arm E for conveniently imparting rotary motion to the shaft 0.

In the upper end of the bearing 13 of the frame B screws a sleeve F, forming a bearing for the reduced end 0' of the shaft, and provided at its outer end with a hand-wheel F for conveniently turning the sleeve F in the bearing B to feed the shaft (1, hereinafter more fully described.

' The tool-holder D is provided with a holder having a hub G secured on the lower end of the shaft C, and from the said hub G extends downward and to one side the offset G on which is formed a dovetail to receive the oorrcspondingly-shaped frame ll, secured in place on the offset G by a screw G passing through a lug g on the offset G and screwing in a similar lug h on the frame I-I, so as to hold the latter in place. In the frame -II is arranged a transverse aperture II, in which is held the cutting-tool I by means of a number of set-screws J, screwing in the frame II against the said tool, as is plainly shown in the drawings. According to the work to be done the cutting-tool I is shaped.

Directly above the cutting-tool I, and in front of the offset i is arranged a threadgnide K, held or formed on an arm K, secured on a transversely-extending shaft I, mounted to turn in suitable bearings in the offset G and secured therein by a set-screw K as is shown in Fig. 2. The thread-guide K is made adjustable by means of the shaft K and the set-screw K so that it may be inclined to any angle, according to the pitch of the thread on which it is to guide the cutting-tool I.

Into the apertured base B is passed the article N to be operated on, the said article extending in line with the shaft C and being held in place therein by set-screws L.

The device thus far described is intended for dressing wagon-axles and cutting a new thread on the dressed part, and its operation is as follows: The device is placed on the axle in the manner shown in Fig. 2, the axle passing through the aperture 13* in the base B, and is secured therein by the set-screws L, so as to extend in line with the shaft 0. The dressing-tool I is then inserted in the frame H, after which the operator turns the handle E to revolve the shaft C and swing the cutting-tool I around the enlarged part of the axle,at the same time feeding the shaft O'downward by the sleeve F, the operator turning the handwheel F. This turning and feeding causes the cutting-tool I to dress down or cut the enlarged part of the axle IT to a suitable depth until it is of the same diameter as the threaded end of the axle. hen this has been done, the dressing-tool I is re moved, a thread-cutting tool is inserted in its place, and the thread-guide K is placed in the old thread on the threaded end of the axle N, with the thread-cutting tool in the thread groove. By now turning the handle E the shaft C,with the tool-holder D, fits itself onto the axle N by the action of the thread-guide K in the old thread of the axle, and at the same time the thread-cutting tool I, passing into the previously-dressed part, cuts a thread on the latter. In case a left-hand thread is to be cut the handle E is merely turned in the other direction. lVhen it is desirable to thread pipes and bolts, the sleeve F, with its hand-Wheel F, is removed, and the threaded sleeve P is screwed in its place until its head P rests on the top of the bearing B In the sleeve P screws a second sleeve Q, having a head Q', carrying a set-screw Q The reduced end C fits into this second sleeve Q, and is secured to the set-sleeve by screwing up the set-screw Q The thread to be cut on the bolt or pipe corresponds with the thread on the second sleeve Q, so that when the operator turns the handle E the shaft 0 turns and is fed inward, on account of the sleeve Q being secured to the said axle, and screwing in the sleeve P. The cutting-tool I thus cuts the thread on the pipe orbolt held in the aperture B of the base B. It is understood that the thread-guide K is removed when the device is used for this purpose. For different threads to be cut on the pipes or bolts a different set of sleeves P and Q is necessary.

It Will be seen that this device is very simple in construction, can be readily applied to a Wagon-axle to dress the same and cut a new thread, or to out new threads on pipes or bolts without removing any of the parts from the wagon or article on which they are held.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent 1. The herein-described tube A, comprising the tubular bearing B the base B, having its aperture in alignment with the bore of the hearing 13 and provided with set-screws, the arms B connecting said bearing and base, the shaft 0, journaled in the said bearing and provided at its inner end with an offset G having a transverse aperture through it from its inner to its outer face to receive a threadguide or follower and having a parallel dovetail across its side next to the base, the out ter-frame having a dovetail face slid into engagement with other dovetail and having a transverse tool-holding opening or recess, the opposite side walls of which have set-screws J J to engage andhold the tool at their inner ends, and screw securing the frame H to the offset G substantially as set forth.

2. In a tool of the character described, consisting in a frame and the rotary shaft 0, having an offset G on its inner end provided with a transverse aperture and a dovetail on its side next to the base of the frame, a shaft K turning in said aperture and having an arm K on its inner end provided witha threadguide K, and a set-screw K engaging said shaft K to bind it and hold the guide at any desired angle, and the frame H, shaped to correspond with said dovetail, slid thereon and provided with a transverse tool-holding aperture I1, parallel with the aperturein olfset G and in' vertical alignment therewith, and theset-screws J, passingthroughthe frame H into said. tool-holding recess, substantially as set forth.

3. In a cutting-tool, the combination, with a main frame, of a shaft mounted to turn therein, a tool-holder, substantially as described, secured on one end of the said shaft, a crank for turning the said shaft, a sleeve screwing in the said frame, and a second sleeve held to screw in the first-named sleeve and in which the said shaft is secured, substantially as described.

SAMUEL T. HARRISON.

XVitnesses:

J. Q. A. BOWLBY, ScoTT GRIFFITH. 

